What's the use of an exhaust silencer?
04/04/2020 14:06
The exhaust silencer plays an incredibly vital role to muffle the noise coming from the blasts inside a combustion engine .It is also used to cleanse the exhaust gases using the assistance of a catalytic converter. Get extra information about engine silencer
The exhaust design,as you might have noticed,includes a bulge towards the end. The explanation behind making this bulge is usually to present a larger cavity for the exhaust gases to flow,this mellows the sound coming straight from the engine and performs on the principle of a Helmholtz resonator.
One other design form, that my physics teacher taught me about ,contains splitting the exhaust stream into two together with the assist of a secondary channel emerging in the pipe and after that reconnecting it back .the length of this secondary channel is such that when the two sound streams meet again ,they're 180 degrees out of phase with respect to one another,this causes destructive interference at this junction! Therefore muffling the sound.
The catalytic converter catalyzes the redox reaction of ‘carbon monoxide-hydrocarbons’(ox) and ‘nitrogen oxides’(red) ,which essentially helps in converting pollutants to less damaging gases.